/* $OpenBSD: nmeaattach.c,v 1.7 2007/01/02 22:49:08 mbalmer Exp $ */ /* * Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * Copyright (c) 2006 Marc Balmer * * This code is derived from software contributed to Berkeley by * Rick Adams. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include int speed = B4800; char devicename[32]; __dead void usage(void); void coroner(int); volatile sig_atomic_t dying = 0; __dead void usage(void) { extern char *__progname; fprintf(stderr, "usage: %s [-dhm] [-s baudrate] [-t cond] device\n", __progname); exit(1); } int main(int argc, char *argv[]) { int fd; char *dev; struct termios tty; struct tstamps tstamps; const char *errstr; tcflag_t cflag = HUPCL; int ch; sigset_t sigset; int nmeadisc = NMEADISC; int nodaemon = 0; tstamps.ts_set = tstamps.ts_clr = 0; while ((ch = getopt(argc, argv, "dhms:t:")) != -1) { switch (ch) { case 'd': nodaemon = 1; break; case 'h': cflag |= CRTSCTS; break; case 'm': cflag &= ~HUPCL; break; case 's': speed = (int)strtonum(optarg, 50, 115200, &errstr); if (errstr) errx(1, "speed is %s: %s", errstr, optarg); break; case 't': if (!strcasecmp(optarg, "dcd")) tstamps.ts_set |= TIOCM_CAR; else if (!strcasecmp(optarg, "!dcd")) tstamps.ts_clr |= TIOCM_CAR; else if (!strcasecmp(optarg, "cts")) tstamps.ts_set |= TIOCM_CTS; else if (!strcasecmp(optarg, "!cts")) tstamps.ts_clr |= TIOCM_CTS; else errx(1, "'%s' not supported for timestamping", optarg); break; default: usage(); } } argc -= optind; argv += optind; if (argc != 1) usage(); dev = *argv; if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) { (void)snprintf(devicename, sizeof(devicename), "%s%s", _PATH_DEV, dev); dev = devicename; } if ((fd = open(dev, O_RDWR)) < 0) err(1, "open: %s", dev); tty.c_cflag = CREAD | CS8 | cflag; tty.c_iflag = 0; tty.c_lflag = 0; tty.c_oflag = 0; tty.c_cc[VMIN] = 1; tty.c_cc[VTIME] = 0; cfsetspeed(&tty, speed); if (tcsetattr(fd, TCSADRAIN, &tty) < 0) err(1, "tcsetattr"); if (ioctl(fd, TIOCSDTR, 0) < 0) err(1, "TIOCSDTR"); if (ioctl(fd, TIOCSETD, &nmeadisc) < 0) err(1, "TIOCSETD"); if ((tstamps.ts_set || tstamps.ts_clr) && ioctl(fd, TIOCSTSTAMP, &tstamps) < 0) err(1, "TIOCSTSTAMP"); if (!nodaemon && daemon(0, 0)) errx(1, "can't daemonize"); signal(SIGHUP, coroner); signal(SIGTERM, coroner); sigemptyset(&sigset); for (;;) { sigsuspend(&sigset); if (dying) return 0; } } /* ARGSUSED */ void coroner(int useless) { dying = 1; }